crack ontosomeone
phrasal verbwithcrackverbuk/kræk/us/kræk/
Australian Englishinformaltobehavein a way thatsuggestsyou areattractedto someone and would like tostartasexualrelationshipwith them:
Already he hascrackedonto onegirl,showingoff histattoosandholdingherhand.
Benappearedtowanttocrackonto Chrissy, but we allknewthat wasn't going tohappen.